def fib(max):
	n, a, b = 0, 0, 1;
	while n < max:
		yield b;
		a, b = b, a + b;
		n += 1;
	return "done";


g = fib(6);

while True:
	try:
		x = next(g);
		print("g : ", x);
	except StopIteration as e:
		print("Generator return value: ", e.value);
		break

